Roberto Durán Samaniego, a retired Panamanian professional boxer, widely regarded as one of the greatest boxers of all time. A versatile brawler in the ring, he was nicknamed "Manos de Piedra" ("Hands of Stone") during his career. ~ Wikipedia

Nine phrases or words entered backwards across with the ending of same as part of a down answer, all clued as “back down” constitutes the interrelated group of this frustratingly unfriendly Sunday crossword.

BEAT A HASTY RETREAT,RTERYTSAHATAEB across with EAT downCAPITULATE,UTIPAC with LATEHEAD FOR THE HILLS,IHEHTROFDAEH with LLSPULL OUT,OLLUP with UTLOSE ONE’S NERVE,RENSENOESOL with VEWITHDRAW,DHTIW with RAWGIVE SOME GROUND, UORGEMOSEVIG with NDCRY “UNCLE”, CNUYRC with LEWAVE THE WHITE FLAG,LFETIHWEHTEVAW with AG